Home / 1,400.40-1,928.16-1,190.16

Finding the Fourth Proportional to 1,400.40, 1,928.16 and 1,190.16

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Solution

The fourth proportional to 1,400.40, 1,928.16 and 1,190.16 is: 1,638.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,400.40 : 1,928.16 = 1,190.16 : x
  2. Step 2: Convert to fraction form
    1,400.40/1,928.16 = 1,190.16/x
  3. Step 3: Cross multiply
    1,400.40x = 1,928.16 × 1,190.16
  4. Step 4: Simplify right side
    1,400.40x = 2,294,818.91
  5. Step 5: Solve for x
    x = 2,294,818.91/1,400.40
  6. Step 6: Final answer
    x = 1,638.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.